diff --git a/src/open_samus_returns_rando/patcher_editor.py b/src/open_samus_returns_rando/patcher_editor.py
index e877c31..9df5808 100644
--- a/src/open_samus_returns_rando/patcher_editor.py
+++ b/src/open_samus_returns_rando/patcher_editor.py
@@ -1,4 +1,5 @@
 import copy
+import functools
 import typing
 from pathlib import Path
 
@@ -74,6 +75,7 @@ def remove_entity(self, reference: dict)-> None:
         scenario.raw.actors[layer].pop(actor_name)
         scenario.remove_actor_from_all_groups(actor_name)
 
+    @functools.cache
     def get_asset_names_in_folder(self, folder: str) -> typing.Iterator[str]:
         yield from (
             name